Make inputcontext plugin loading a bit more generic

Add a create() method to the inputcontext factory that
takes no arguments.
Add a virtual isValid() to QPlatformInputContext to
determine whether it actually works.
Remove IBUS dependencies in the xcb code so that it
can also load other plugins.

Change-Id: I6345a845f48fd4b3cacf6d8652711b16835a235c
Reviewed-on: http://codereview.qt-project.org/4487
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
index b6e40489c0..84b578db16 100644
--- a/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
+++ b/src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.h
@@ -53,7 +53,7 @@ public:
     QIBusPlatformInputContext();
     ~QIBusPlatformInputContext();
 
-    Q_INVOKABLE bool isValid() const;
+    bool isValid() const;
 
     void invokeAction(QInputPanel::Action a, int x);
     void reset(void);